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http://dx.doi.org/10.9713/kcer.2017.55.1.1

Stability of Pre-treated Fillers for High Loaded Printing Paper  

Seo, Yung Bum (Department of Bio-based materials, Chungnam National University)
Choi, Jin Sung (Department of Bio-based materials, Chungnam National University)
Ji, Sung Gil (Department of Bio-based materials, Chungnam National University)
Publication Information
Korean Chemical Engineering Research / v.55, no.1, 2017 , pp. 1-6 More about this Journal
Abstract
More addition of calcium carbonate in printing paper allows savings of the wood fibers and the drying energy. Pre-flocculation of GCC (ground calcium carbonate) using functional polymers was known as the best available technology to make high loaded paper until now, and it allowed less reduction of the paper essential properties such as tensile strength and smoothness at higher GCC content. However, pre-flocculated GCC became unstable in size under the continued agitation in the mill. Therefore, pre-flocculation method was modified in such a way that the in-situ calcium carbonate was formed between the GCC particles of the pre-flocculated GCC, and the resultant became more stable in size, which we named as HCC (hybrid calcium carbonate). HCC turned out to make high tensile strength and smoothness as much as the pre-flocculated GCC and gave much better size stability against stirring. Furthermore, HCC gave high bulk that pre-flocculation could not make.
Keywords
Calcium Carbonate; Printing Paper; Pre-flocculation; HCC (hybrid calcium carbonate);
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